Spring rate and damping is pre-set. This symmetrical Progressive Suspension monotube fork spring kit requires no modification to forks, but offers true high performance front suspension with improved stability in cornering and better road holding. Features a set of gas charged Monotube damper cartridges and a set of custom tuned fork springs. Comes as a complete replacement kit including all internal fork components, apart from the fork tubes and oil. Note: Available in a standard height and a 1 to 2″ lowered version. See 565251 for standard height.